1·Don't forget to seal the envelope.
别忘了把信封封好。
2·You must seal up the envelope before mailing the letter.
你在寄信前必须先将信封密封。
3·Once you're done, sign off your name with today's date. Safe keep your letter. Put the papers in an envelope. Seal it.
写完后，别忘了在名字下面写上今天的日期。妥善保管你的信件，把信纸放在信封里，封上信封。
4·Thanks. Here is the money order. Please put in the envelope, and then seal it.
谢谢。这是邮政汇票。请您把它放入信封，然后把信封好。
5·Blease put your articles in this envelope and seal it.
请把你的物品放在这信封内并封好。
6·You can put some change into this envelope, seal and give it to the cabin attendants.
您可以把零钱放在这个信封里，封口后交给乘务员。
7·"David," she said, when she caught her breath. "You didn't seal that envelope very well."
“大卫，”等她缓过一口气后，说道，“你的信封封得不是很好。”
8·TO ENSURE CONFIDENTIALITY, please enclose the report in an envelope and sign on the seal line before giving the report to the applicant for submission.
为确保推荐信的保密性，请推荐人将推荐报告置于信封内，密封后在信封口签名，再给申请者呈交。
9·The mail room personnel create an envelope by using the recipient information in your letter, seal your letter in an envelope, and drop the envelope in the mailbox for delivery.
收发室人员使用信件中的收件人信息制作信封，并将信件封在信封中，然后将信封投入信箱以进行投递。
10·At the end of the letter, seal it in an envelope, write the date to open it on the cover and put it in a safe storage space.
写完信，把它装到信封里，在信封的封面上写上日期，把它妥善保管起来。